Lighting device



FIG. 1 is a perspective view of a lighting device according to the new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is an enlarged top plan view thereof; and,

FIG. 7 is an enlarged bottom plan view thereof.

The broken lines illustrate portions of the lighting device that form no part of the claimed design. 

CLAIM The ornamental design for a lighting device, as shown and described. 